Profile Design WING/20c Base Bar - 31.8 Clamp 38cm Carbon BlackProfile Design WING 20c Base Bar 31. 8 Clamp 38cm Carbon Black. The Profile Design WING 20c is optimized for aerodynamics as well as strength and stiffness. It also offers the ability to alter the hand grip position by 20mm. The truncated aerofoil shape of the basebar is a key element of the balance between aerodynamics strength and comfort. Smooth transition from the wing to the grip aids air flow and giving a better platform for the rider to rest